Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han vang cua snippets" » "han yang cua snippets", "van vang cua snippets", "phan dang cua snippets", "han mang cua snippets", "han hang cua snippets", "han tang cua snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("han vang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han vang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han vang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han vang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.